Parallel-jaw wrench or brace



June 24, 1930. w. F. HoBBs Er AL PARALLEL JAW WRENCH OR BRACE Filed. Sept. 17. 1927:

` 31m/vamo@ theta Withwthe VVVforegoing fand othert Objects in time.; June 24,1936] Wilnis vn; BBs IND 'JOHN A.. ANDEnsoN, 0F BnDGEPoRT, coivNEcTIcUT, iAs'sIGNoias I {manzana-JAW warnen on" :31m-'eli` grippingzdilerent sizes of .nuts orftool Shanks and. are; easily Y and quickly clamped for re-v leased for the --entire heightfthereoior :if u'se'dyfny a btgforf similar toolwl grip -squarely:fand uniform-ly along rthe/length of the shank ol' view, we .have-.devised -thefconstruetion illustrated inthe accompanying fdravving;fforin-r :Eigi 1iisfaxsidejelevation;fo .a `iframe or brace carnymgourimprovedjaw structure.'y

Fig. 2 is a partial longitudinalfse'ction :and

partial :side 'elevation yshowingf'our improved.

25 a'wfconstruction on anenlargedscale; j

Y Eig. 15 :is an end view of "the :j aw. :structure 'lookingftowardthe bottom of Eig; f2.j i

. f Fig. `5611s asimilar vewgshowing v'theyja'w's f of auslightly:diierent-fshapefor use 11 as the jaws 1 of fa bram-3e, :showing the shanklAo-f a' 'ftool` linsection, the Vsection .being suhstann tiallyOndine-,6&6oaffliggand F ig. 7 is a side elevation offthefja'gw and 'llh jf operating frame kor.i-l'njrgace :str ture comprises'theusualmetalrod loefhavngatcen;

'tralsolfset fllliformingjf arcrank'jby'whi -franieimay fbe 'rotate mounted ratfene. endvtheree'i ate a1 nut milioni. i: .fllisi eff-set' "ca'r' yusual5rdtatablejslee't'e LZfo the: 'tatablevholdingknb13 -y ylindricalbodycmeinber @estremisti-fasi@las@se@ i 10 'andito which ity may ,f -and are so arlranged"st hat, they Y are f lo maintained always in,.substantially fparallel relation so that they grip squarely on thefmit veachzjaw adjacent the headfthereoi.

are als-o1` pivotedi together Lat substantially I v Yz5.Y f. Y opposite cndshavekroundedip ortionsQS rest ing Vion the bottom :of the rgrooves 245s() as to l end :to-receive the yend ofthe lrod orf frame he secured Ahy any suitable means, such as a pin-16.` LThisrhody isthreaded on its outer-surface, as-shown yat l7, and A hasastransverse slot 1.8 for-"the jaws .Theljaws :have yheadsgor gripping iport1ons120 'and'cxtensions forming body or tail portions-2l of a thicknessv substantiallythe Y widthfofthe slot-18,"and the'jaws areretained v 6o.

.in the' slot and prevented from fallingoiit 'the openendfthereofby coactingftransverse'slots vandlibsf22iand 23 formedon vthe'linnerwalls' of thel slot ,-18 andthe outer `side.;Wallsfof :the l jaws respectively. These co'acting-slotsandf Y' rih's preventthe jawsmovng 'longitudinally' fin the bodymember abut permit. i'r'ee lateral jaws toward and'rom each movement fof zthe othen The'weXtensions .Qlflof `the jaws have l longitudmal grooves24 in their opposed'sui. s A. facesyandzbetween the jaws isa pair of levers. 25.l IThese-levers are-each pvoted at one end,

theirfmidlenlgthfas shown at 27, andil attheir orm'aombination sliding andpivota'l coin-` .of the jraws-l This -slding'engagement with the jaws 'permit-sy relative longitudinal move! mentbetween'theljawsfandlevers.1 Thefjaw's' .Y havevontheirouter edgesf'adj acent thei-rheadsV inclined cam surfaces 29which are adapted y toA lcooperate with an'inclinedfcamsr-face 30 on an' internallyA` threaded sleevel'.-f This l Asleeve'is'1tlnejadedenithe body member, and A Y tudinallyof this member.

They i ectionbetween the `leversandjthe extensionsy .than those shown in Figs. Vl to 5 andthe re- Y* cess .'38 is somewhat differentlyshaped to thesleevel in the'proper move longitudinally of "the Y ferred'thatthe threads V17' b .Y Vas with thisfarrang'ement the engagement or' ft-he' sleeve withsoirie outside element \vhile tightening V yadaptit to grip the shank'39 ofa bitor other 1 tool, but the operating mechanism ofthejaws is exact-ly the sarnefrin bothfcases-.jl i The operati'on'is as followsVB'y rotating direction itwill body member toward theheads ofthe j'aws,and'it isppref-` up Vthe nuts, for example, is'less l likely to release the j ,WS; AS the sleeve'moves 1.37,v or the shank;

i Y "from, eachother f Y neen-ng. pivote? 29 onthe `jaws tends ing-fa brace." It pressure lon theoute'r sides of the jawscome binedwiththe.outwardpressure of the nutV jf or vshank being eXtensionsZll of] the :jaws againstthe inner gripped will .tend to 'hold .the

" ends 28 of the levers, andfas thepivot 27 be' tween Vthe llevers V1s at substantially theirmid lengths..theirfopposite ends move toward or practically an equalamount `1 during..manipulationsofthatV 'theyalways f fmaintain/thefjaws in substantially vparallel 'frelation.- 'JIt is, iot'course,understood .that

V' during adjusting movementsof the jawsthe roundedftails ends QSorfthe'levers slide along the bottoms ofv the grooves. Q4@ these. levers.

. v fllhereore, as thejaws are always maintained Y' VVin substantially parallel.relation they Ywill 'squarelyf'and'uniformly gripthe nut orthe shank'ror theentire' length of the aws, Sing maximumgripping effect /is less likelylto'mar vo r break` vshank becausetitlis uniform.throughoutthev .the-gripping SuraCesjThe spring.. 33 Vtends to-rotate: the lleversab'outtheir ,con-V i to separate the aws', vsothatvr Blisgrotateld in the opposite dif rection to move its cam surface 30 awayroin fthe Vcam surfaces 29 on-the jaws, these cam give it the sleeve surfaces willbe maintained yin lengggagement and thej aws ,opened'under the vaction* of the entn, whatwe-claimde iV x Having thus v eachi other and havin'gtailendsv e lei'thand threads 'lengths and @actas in substantially parallel relation; y

l. wrenchOpbra'ce,a-bodyjmemberV and one which thenut orthel f Ved inthe-islet; cooperatinggguidefmeanslon the bodyiand jaws .tos-retainthel awsgagainst v longitudinal'movement'.while.permittingflate v eral. `moi'fein'elltv toward, and.-romleachfother, he1r"op f .rirofffi'wsfadapted to gripithegfoppos'ite sides-of Aan article toberota-ted,,abodv.member having atrans# f .ed AVwith longitudinal. grooves V posedsides,apairhllevers betlw `Arif-.the jaws Y Y andlpivo'tally connected .intermediate their Y gaging'fextension's ofthe-jaws'on Y Y i v theopp'osite side of the'pivotbetween the levers from the pivotal connections lto. theV body member,

`2. ln a iwr'enclfor brace,A

longitudinally thereof, jj c oacting; "carni ,isur-k faces Von `levers pivoted 4together lintermediate their 4'sociated withsaid' j aws for rocking movement relative thereto at the op: posite ends of said levers to maintainth'e Vj aws a'fbedvmmber having a transverse slot, afpair.` of gripping 'de' 1 jawsmountfed in theslot for :lateral nnoveeV ment towardand from each otheiga sleeve. Y. mounted Von, theV body member for movement* 1 the'sleeve and thefjaws', a'parotllfr" having a transverse slot,'a'pairofj avvs mount@y edf in the 's lot, cooperatingguide means {on the bodyand' jaws to retain thej avss.agaiI'st` longitudinal-movement in theslot and permit from eachother, nieansfmounted;'onthezbody 'lateral movement or fthe'ljaws' toward land l ed forlateral slidingmovementsinsaid slot,

a .pair otlevers pivoted'to each otherinter mediate. their lengthsand having'pivotal connection withthe respective jaws'a'djacent one end, said levers .each-associated withlrthe re-V spectivejaws forfsliding movementrelative thereto atVv their opposite ends, and means v mounted onthe body and `*movable relatively theretoto'operate thejjawsandfclamp them vonanelement.` V5. Ina wrenoho ed orlateral sliding movements'in said! slot tween the jaws and'fpivgoted together[interi` mediate their lengths,i.said levers -beingpiv '-oted at oneendto vthe'1re spective j alws and at;l

their: opposite ends` resting on the bottoms of the jrespective.groo-.ves, .a :sleeve `embracing .the body andjawsandthreaded on thebody, Y. 1 vsaid jaws being providedwith inclinedcamY Y adapted for "ariin wrench torre-f `finovin'g, or V.securing-the ldemo'unt-ablei rims of `@motor-vellicles, but obviouslyis notilimted 6.v Vln'awrenchvorbrace, having a transverse slot, a pair of jaws 'mount- .Surface @11d-"the rS1.Gevel@@lng provided w1th 1 Y a Qammlng surfacelcooperating with .those on E operating Cam surfaces on the jaws and sleeve to clamp the jaws on an element, and a spring tending to 4separate the jaws.

In testimony whereof wev affix ourr signatures. s

s WILLIS F.`HOBBS. l v JOI-IN A; ANDERSON. 

